NOAA/WDS Paleoclimatology - Plio-Pleistocene Tropical Alkenone SST Reconstructions
This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Paleoceanography. The data include parameters of paleoceanography with a geographic location of Indian Ocean. The time period coverage is from 5069892 to 1290 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
- Cite as: Herbert, T.D.; Peterson, L.C.; Lawrence, K.T.; Liu, Z. (2010-06-22): NOAA/WDS Paleoclimatology - Plio-Pleistocene Tropical Alkenone SST Reconstructions. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/we6n-qe21. Accessed [date].
- Please refer to Credit tab for full citation information.
- doi:10.25921/we6n-qe21
- noaa-ocean-10493
- NCEI DSI 1200_02
- NCEI DSI 1200_01
noaa-ocean-10493
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Ordering Instructions | Contact NCEI for other distribution options and instructions. |
Distributor | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | Data Center Contact
NOAA World Data Service for Paleoclimatology 828-271-4800 paleo@noaa.gov |
Coverage Description | Date Range: 5069892 cal yr BP to 1290 cal yr BP; |
Time Period | -5067942 to 660 |
Spatial Bounding Box Coordinates |
N: 19.4567
S: -3.1
E: 116.2729
W: -90.82
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Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed, especially in columns
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Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Data update frequency not available |
Supplemental Information |
STUDY NOTES: Alkenone data for 4 tropical ocean sediment cores, determined at Brown University. Data set includes composite depth, age estimated from matching stable isotope data to the Lisiecki and Raymo (2004) benthic stack, Uk'37 measured, and the conversion to estimated sea surface temperature (SST). Stable isotope data were generated at Brown University by Steven Clemens and Warren Prell. Note that the stable isotope data for ODP722 come from Clemens et al. (1996), sampled at ~7 kyr resolution, so the ages associated with the samples have more uncertainties than the other data sets published in Herbert et al. (2010).
ABSTRACT SUPPLIED BY ORIGINATOR: Determining the timing and amplitude of tropical sea surface temperature (SST) change is an important part of solving the puzzle of the Plio-Pleistocene ice ages. Alkenone-based tropical SST records from the major ocean basins show coherent glacial- interglacial temperature changes of 1° to 3°C that align with (but slightly lead) global changes in ice volume and deep ocean temperature over the past 3.5 million years. Tropical temperatures became tightly coupled with benthic d18O and orbital forcing after 2.7 million years. We interpret the similarity of tropical SST changes, in dynamically dissimilar regions, to reflect "top-down" forcing through the atmosphere. The inception of a strong carbon dioxide-greenhouse gas feedback and amplification of orbital forcing at ~2.7 million years ago connected the fate of Northern Hemisphere ice sheets with global ocean temperatures since that time. |
Purpose | Records of past climate and ocean circulation derived from marine sediments. Parameter keywords describe what was measured in this dataset. Additional summary information can be found in the abstracts of papers listed in the dataset citations. |
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Theme keywords | Global Change Master Directory (GCMD) Science Keywords
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Data Center keywords | Global Change Master Directory (GCMD) Data Center Keywords
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Last Modified: 2024-03-18
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